NORMINV uses an iterative technique for calculating the function. Given a probability value, NORMINV iterates until the result is accurate to within ± 3x10^-7. If NORMINV does not converge after 100 iterations, the function returns the #N/A error value.

Example

Probability

Mean

StdDev

Formula

Description (Result)

0.908789

40

1.5

=NORMINV([Probability],[Mean],[StdDev])

Inverse of the normal cumulative distribution for the specified arguments (42)